JPH02160359A - Fluorescent lamp for display - Google Patents

Abstract

PURPOSE:To reduce the number of electrodes and obtain color display with high brightness by furnishing a mating electrode assuming display colors of red, green, and blue, and providing a common electrode to perform discharge with this mating electrode. CONSTITUTION:A fluorescent lamp for display is equipped with a plurality of light emitting chambers 6 for respective colors, which are furnished with rare earth fluorescent films 6R, 6G, 6B assuming display colors of red, green, and blue and also mating electrodes for respective colors, and with an electrode chamber in which mating electrodes 13, 14, 15 for respective colors and a common electrode 12 performing discharge and which is partitioned by bulkheads 8a, 8b... provided at one end with a discharge communication part 9 in communication with the light emitting chambers 6. Thereby electrode forming couples with the mating electrodes 13, 14, 15 for respective colors can be managed with one common electrode 12, which allows reduction of the number of electrodes to lead to obtainment of high brightness for each color.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention relates to a fluorescent lamp for display purposes, and is used, for example, as a guide display device, an electric light display device, or a display element such as a display. The present invention relates to a single-tube multicolor luminescent lamp suitable for.

(Prior Art) As a display element used in conventional outdoor guidance signs, electronic display devices, displays, etc. that display characters and images,
For example, Utility Model Publication No. 39-22214 and Utility Model Publication No. 3
As described in Publication No. 9-22215, the display surface of one tube is divided into three parts, and three colors of light, red, green, and blue, are emitted using the display surface of the same tube. There are known arc tubes. This conventional arc tube has a target having red, green, and blue luminescent material layers in an integrated outer tube, and uses CR to make the target emit light using an electron beam.
It is T.

Furthermore, as described in Japanese Patent Application Laid-Open No. 57-124832, a fluorescent film exhibiting display colors of red, green, and blue is formed on the front surface of one tube, and the inside of this tube is A display element is known which has a structure in which counter electrodes for each color are formed on the circumferential surface, and a common electrode of an aluminum strip plate that performs electric discharge is formed radially from the center of the counter electrodes for each color.

(Problems to be Solved by the Invention) In the conventional display elements described in the above-mentioned conventional Japanese Utility Model Publication No. 39-22214 and Japanese Utility Model Publication No. 39-22215, the target is irradiated from the viewpoint of thermal deterioration of the luminescent material. There is a limit to the intensity of the electron beam that can be produced, and for this reason, the brightness is 50% lower than that of a fluorescent discharge lamp using a rare earth fluorescent film.
Furthermore, since a high voltage is required to accelerate the electron beam, the socket becomes larger and more complex. There is a problem in that the effective light emitting area of the display device cannot be increased because the bodies cannot be placed in close contact with each other.

The present invention was developed in view of the above problems, and it is possible to improve the mounting density in a display device by integrating three color fluorescent lamps and reduce the number of lamp sockets and y-to-pieces.The present invention also reduces the number of electrodes and simplifies the process. The present invention provides a display fluorescent lamp that is inexpensive to manufacture, easy to install, and provides a high-intensity color display.

[Structure of the invention]

(Means for Solving the Problems) The display fluorescent lamp of the present invention includes a tube whose inside is filled with mercury and an inert gas and whose front part is a display surface, and a tube provided inside the tube with a display surface. A plurality of light-emitting chambers for each color are separated from each other by partition walls extending in intersecting directions, and are each provided with a rare-earth phosphor film exhibiting display colors of red, green, and blue, and are each provided with a counter electrode for each color. , an electrode chamber provided in the tubular body and containing counter electrodes for each color and a common electrode for discharging, and partitioned by a partition wall forming a discharge communication portion communicating with each of the light emitting chambers at one end. It is characterized by this.

(Function) In the display fluorescent lamp of the present invention, when electric power is selectively supplied between the common filament electrode and the common filament electrode, a discharge occurs between the common electrode and the counter electrode, and the display surface is illuminated by the fluorescent film. It emits light in red, green, and blue, either monochromatic or mixed colors, depending on the light film. In one lamp, multiple counter electrodes are provided corresponding to the common electrode, reducing the number of electrodes.Furthermore, since the fluorescent film is formed from a rare earth fluorescent film that emit light of different colors, each color has a high It is possible to obtain brightness, and in particular, the brightness can be increased to about twice that of a CRT type lamp.

(Example) The configuration of an embodiment of the present invention will be described with reference to the drawings.

In FIGS. 1 to 4, reference numeral 1 denotes a fluorescent lamp, which includes a cylindrical lower outer tube portion 4 made of transparent glass having a stem portion 3 with one end open and the other end closed; A single cylindrical tube body 2 is airtightly connected to an upper outer tube portion 5 having a flat U-shaped cross section and formed of transparent glass and forming a display surface 7 by sealing the open end surface of the outer tube portion 4. is formed.

5 The inside of the pipe body 2 of the lever contains 0.005 to 0.00
It is filled with an inert gas such as mercury at 6 mmH and argon gas at a pressure of several mmHH.

Furthermore, red, green, and blue fluorescent films 6R, 6G, and 6B are provided on the inner surface of the upper outer tube portion 5 of the tube body 2.
They are formed with equal areas every 120 degrees radially from the center. The fluorescent films 6R, 6G, and 6B are preferably made of high-luminance rare earth phosphors, and the fluorescent film 6R exhibiting red color is
For example, (Y, Eu) 20 v, the fluorescent film 6R exhibiting green color is, for example, (Y, Ce, Tb) 2S
I05, and the blue-colored fluorescent film 6B is, for example, (
S", Ca, Eu) IQ (PO4) b C
12 is used.

Further, a central partition wall 8 is formed in the center of the lower outer tube section 4 and extends in a direction intersecting the display surface 7 in the same circular shape as the outer peripheral surface of the lower outer tube section 4, and this central partition section 8! A circular electrode chamber 8 is formed inside. Further, a side partition 8b is provided which extends radially from the outer circumferential surface of the central partition part 81 to the inner circumferential surface of the outer wall of the lower outer tube part 4 in a direction intersecting the display surface 7 at an angle of 120' to each other. Three fan-shaped light emitting chambers 6 are formed by the side partitions 8b, corresponding to the respective fluorescent films 6R, 6G, and 6B.

The central partition wall 81 forming the electrode chamber 8 is formed to be slightly lower in height than the side partition wall 8b forming each light emitting chamber 6, and the upper edge of the side partition wall 8b is connected to the lower outer tube section. The light emitting chambers 6 and the electrode chambers are formed at a height slightly below the opening edge of the central partition wall 81 and the display surface 7 of the upper outer tube 5. A discharge communication section 9 is formed to communicate with the discharge communication section 8.

Further, the electrode chamber 8 is provided with a triangular common filament electrode 12 connected to two wells 10 and supported by two insulating balls If. Further, in the light emitting chamber 6, a counter electrode H, 14 made of a filament connected and supported by two wells 10 arranged in a straight line opposite each side of the common filament electrode 12;
15 are provided. Each of these wells 1G is inserted into the thick portion of the stem portion 3 in an airtight manner and led out.

Next, the electrical connection of the display fluorescent lamp 1 will be explained based on FIG. 5.

The common filament electrode 12 is connected to one pole of the AC power supply 21, and each counter electrode +3.14. Is are connected to the other pole of the AC power supply 21 via dimmers 22, 23, and 24, respectively. And each of these dimmers 22.23゜2
4 changes the ballast circuit based on the dimming signals input to the terminals a, b, and c, and controls the power supplied between the common filament electrode 12 and each counter electrode +3, 14, and 15.

Note that the common filament electrode 12 and each counter electrode +3. 14. 15 are connected to filament transformers 25 and 26, respectively, and are preheated.

Next, a method of manufacturing the fluorescent lamp of this embodiment will be explained.

The lower outer tube portion 4 having the stem portion 3 and the partition wall 81°8b are integrally molded from transparent glass, and the partition wall l of the stem portion 3 is
i! , two wells 10 are inserted and fixed at positions corresponding to each light emitting chamber 6 and electrode chamber 8 partitioned by partition walls 8! Two insulating balls 11 are also fixed in the electrode chamber 8 partitioned by.

Two wells 1 provided in each of the light emitting chambers 6
A common filament electrode is formed in a triangular shape by connecting both ends of opposing electrodes 1314 and 15 of the filament between the tips of the two wells 10 and supporting the tips of the two wells 10 provided on the partition wall 8M with insulating balls 11. Connect both ends of 12.

Further, the upper outer tube part 5 is formed of transparent glass, and the inner surface of the display surface 7 is coated with red, green, and blue phosphors divided radially into three equal parts to provide phosphor films 6A, 6B, and 6c.

Next, the upper outer tube section 5 is hermetically welded to the opening edge of the lower outer tube section 4.

Furthermore, after exhausting the air inside the tube body 2 from an exhaust pipe (not shown) provided in the lower outer tube portion 4, mercury and argon gas are filled in to close the exhaust pipe.

Next, the operation of this embodiment will be explained.

Common filament electrode 12 and counter electrode 13.14°15
When power is selectively supplied between the common filament electrode 12 and the counter electrode +3.14.
A discharge occurs between the display surface 7 and the luminescent film 6.
It selectively emits red, green, and blue colors corresponding to R, 6G, and 6B. The brightness of these three colors is determined by terminal a,
It is changed by changing the dimming signals output from b and c, and by adjusting this dimming signal, the color of the display fluorescent lamp 1 corresponding to one picture element can be changed.

Further, in the structure of this embodiment, the fluorescent films 6R and 6G.

By using a fluorescent discharge method in which 6B is formed and using a rare earth phosphor, for example, the brightness can be improved to about twice that of a conventional single-tube three-color CRT method.

. Furthermore, since the fluorescent lamp 1 is a single tube, it is possible to increase the packaging density in the display device compared to a configuration using three display elements with the same area of display surface. The area can be increased, and the average brightness of the display device can be increased.

Also, in this embodiment, the common filament electrode 12 and the counter electrodes +3.14. 15 is provided on the stem portion 3 formed on the other end surface of the tube body 2, so that the base can be formed integrally, and the socket provided on the display device side can also be formed integrally, so that the fluorescent lamp 1 and the socket can be miniaturized.

Furthermore, three pairs of electrodes are connected to three opposing electrodes at 13.14°15
and one common filament electrode 12, the number of electrodes normally required can be reduced to four, and eight wells 10 are sufficient instead of 12.
The base can also be 8 pins, which simplifies the structure of the base and socket, facilitates manufacturing and assembly work, and reduces manufacturing costs.

Further, the electrode chamber 8 and each light emitting chamber 6 are connected to each other by a discharge communication section 9.
The discharge path is formed in the shape of a letter, and even if the total length of the tube body 2 is short, the discharge path length required for the required brightness can be obtained.

Also, the partition wall 8 of the lower outer tube portion 4! , 8b are formed to be lower than the opening edge of the lower outer tube portion 4, thereby preventing damage to the partition walls 8g, 8b during the manufacturing process.

Next, the specific dimensions of this fluorescent lamp 1 will be explained.

The diameter R of the tube 2 is 4511, the height of the tube 2 is 45,
The height h2 of the partition wall 8b that partitions each light emitting chamber 6 is 40 mm, and the height of the partition wall 81 forming the electrode chamber 8 is 35 mm.

In the above embodiment, the tube body 2 was formed into a substantially cylindrical shape, but it was formed into a rectangular tube shape, and the three-color fluorescent films 6R, 6G, and 6B were formed radially on the display surface as in the above embodiment. At the same time, the lower outer tube portion 4 is connected to the partition wall 8! , 8b may be divided into the light emitting chambers 6 and the electrode chambers 8 at the center and the surrounding area.

Further, the upper outer tube portion 5 is not limited to a planar shape, but may also be curved.

Alternatively, the tube body 2 may have a rectangular tube shape, or the upper outer tube portion 5
In a configuration where the display surface 7 and the partition walls 8a and 8b are curved, the heights of the partition walls 8r and 8b relative to the lower outer tube section 4 are adjusted, and the display surface 7 and the partition walls 8a and 8b are adjusted in height.
8b, it is necessary to always form a gap sufficient to form the discharge communication portion 9.

Further, on the outer surface of the upper outer tube portion 5, colored coatings of red, green, and blue can be formed to correspond to the red, green, and blue display surfaces 7.

Further, the lower outer tube section 4 includes the stem section 3 and the partition walls 8a, 8.
b is integrally formed, but the lower outer tube portion 4 and the partition wall 8
It is also possible to separately form the stem portion 3 provided with 3.8b and then weld the stem portion 3 and the lower outer tube portion 4. In this configuration, a slight gap is formed between the tube body 2 and both ends of the partition wall 81.8b in order to insert the partition walls as and 8b, but this gap is blocked from the viewpoint of electrical discharge. Therefore, the discharge path will not be short-circuited during discharge.

〔Effect of the invention〕

According to the present invention, there are provided a plurality of light-emitting chambers for each color, each provided with a rare earth fluorescent film exhibiting red, green, and blue display colors and provided with a counter electrode for each color; It has a built-in counter electrode and a common electrode for discharging, and an electrode chamber partitioned by a partition wall that forms a discharge communication section communicating with each light emitting chamber at one end. are shared by one common electrode, reducing the number of electrodes. Also, since the fluorescent film is formed of a rare earth fluorescent film, it is possible to obtain high brightness for each color.
The luminance can be improved approximately twice as much as that of the RT type lamp.

[Brief explanation of the drawing]

1 is a vertical sectional view taken along the line nn in FIG. 2 of a fluorescent lamp for display showing an embodiment of the present invention, FIG. 2 is a cross-sectional plan view of the same, and FIG. FIG. 4 is a longitudinal sectional view of the portion m, FIG. 4 is a plan view of the same as the above, and FIG. 1. Fluorescent lamp, 6R, 6G, 6B. Fluorescent film, 6. Light emitting chamber, 7. Display surface, 8. Electrode chamber, 8 m.
, 8b...Partition wall, 9...Discharge communication part, 12...Common electrode, 13.14. 15...Counter electrode.

Claims (1)

[Claims] (1) A tube body filled with mercury and inert gas and with its front surface as a display surface, separated from each other by a partition wall installed inside this tube and extending in a direction that intersects the display surface. and a plurality of light emitting chambers for each color each provided with a rare earth fluorescent film exhibiting a blue display color and each having a counter electrode for each color, and a plurality of light emitting chambers for each color provided in the tube body and provided with counter electrodes for each color in the electrode chambers and a discharge. 1. A display fluorescent lamp comprising: an electrode chamber having a built-in common electrode for performing the above-mentioned light emitting chambers, and an electrode chamber partitioned by a partition wall having a discharge communication section formed at one end communicating with each of the light emitting chambers.